The angle between the reflected wave and the normal is called what?

The angle between the reflected wave and the normal is called what?

• A. Angle of reflection
• B. Angle of incidence
• C. Refraction angle
• D. Complement angle

Answer: (A)

When a wave hits a boundary, the angle between the reflected ray and the line perpendicular to the surface (the normal) is called the angle of reflection. This is the quantity described by the law of reflection, which states that the angle of incidence (the angle the incoming ray makes with the normal) equals the angle of reflection. The other terms refer to different directions: the refraction angle is the angle of the refracted ray in the other medium, and a complement angle isn’t a standard term used here.

When a wave hits a boundary, the angle between the reflected ray and the line perpendicular to the surface (the normal) is called the angle of reflection. This is the quantity described by the law of reflection, which states that the angle of incidence (the angle the incoming ray makes with the normal) equals the angle of reflection. The other terms refer to different directions: the refraction angle is the angle of the refracted ray in the other medium, and a complement angle isn’t a standard term used here.